linux-kernel - Re: [EXT] Re: [PATCH v2 RESEND 1/1] net: fec: add xdp and page pool statistics

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Message-ID: <Y3Jsenmh9dbAauQS@lunn.ch>
Date:   Mon, 14 Nov 2022 17:27:38 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Shenwei Wang <shenwei.wang@....com>
Cc:     Alexander Lobakin <alexandr.lobakin@...el.com>,
        Paolo Abeni <pabeni@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "imx@...ts.linux.dev" <imx@...ts.linux.dev>
Subject: Re: [EXT] Re: [PATCH v2 RESEND 1/1] net: fec: add xdp and page pool
 statistics

> I did implement a quick version of u64_stats_t counters, and the performance impact
> was about 1~3Mbps on the i.MX8QXP which is 1.2GHz ARM64 Dual Core platform, which
> is about 1.5% performance decrease.

Please post your code.

Which driver did you copy? Maybe you picked a bad example?

      Andrew